I have a sailfin tang that has some small white spots here and there, not many at all about 5 or 6 i can see. they are inconsistant not in the same spot and not as many from day to day. He shows no signs of scraching on the rocks he has not lost his desire for food every now and than I see the cleaner shrimp picking at him but not sure if its at the white spots. Is this ick? no other fish has them cross my fingers.